The e-mail that an alert sends out isn't the prettiest e-mail in the world. It produces a pretty-wide HTML table with fields that we don't need.
Is there a way to customize the e-mail output? I think someone asked a similar question on here a while ago, and the answer involved modifying a python script. I'd prefer not to go that route...
There's no way to currently do this. I have submitted an enhancement request for this. If you submit one, it'll be more likely this feature gets added.
As for removing fields, you should modify the search that generates the alert and add in the
fields fieldname1 fieldname2 ... search command (and maybe also
fields - _*) to select and order the fields you want included.
You should try to edit the sendemail.py. Mails are created and sent by this script.
The best way is to duplicate the script and modify all you want and use this script with your alert. I am working on the script to modify the format too 🙂